Cassiopeia · Yuumi Interactions
Interaction Details
Cassiopeia
- R
Stun can interrupt Yuumi's (detached) R 
Channel. - R Stun cannot interrupt Yuumi's (detached) W Dash.
However, the Stun still applies.
However, Yuumi's W goes on Cooldown.
Yuumi
- W Dash cannot be used while affected by Cassiopeia's W
Grounded.
It even puts W on Cooldown. - (Just a curious mechanic)
If Yuumi runs into the Grounded effect while dashing with W to attach to another target, W goes on Cooldown,
but the Dash already in motion isn't cancelled — once the attach completes, the Cooldown disappears.
